<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
<div id="app">
    <input type="button" @click="setM" value="修改">
    <input type="text" v-model="message" @keyup.enter="getM">
    <h2>{{message}}</h2>
</div>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
    let v = new Vue({
        el:"#app",
        data:{
            message:""
        },
        methods:{
            getM(){
                alert(this.message)
            },
            setM(){
                this.message="zhoujiao"
            }
        }
    })
</script>
</body>

</html>